The remote host is missing an update to gforge announced via advisory DSA 1945-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201945-1

Sylvain Beucler discovered that gforge, a collaborative development tool, is prone to a symlink attack, which allows local users to perform a denial of service attack by overwriting arbitrary files. For the stable distribution (lenny), this problem has been fixed in version 4.7~rc2-7lenny3. The oldstable distribution (etch), this problem has been fixed in version 4.5.14-22etch13. For the testing distribution (squeeze), this problem will be fixed soon. For the unstable distribution (sid), this problem has been fixed in version 4.8.2-1. We recommend that you upgrade your gforge packages.